Improvement in apparatus for bolting flour



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provement in Apparatus for Boltng No 9,611. Patentedluly16,1872.`

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DAvID sPEoK, on wEAvEn-ron, MARYLAND.

VIMPRovlalvIENr IN APPARATUS FOR BoLTlNe FLouR.

Specification forming part of Letters Patent No. 129,611, dated July 16, 1872.

Specification describing certain Improvements in Bolting Flour, invented by DAVID SPECK, residing at Weaverton, in the county of Frederick and State of Maryland.

My invention consists in certain novel combinations and arrangements of parts, which will be more generally explained in the ensuing description, and specicall y pointed out in the claims.

Figure l represents an end elevation, showing the elevator in section. Fig. 2 is a transverse section. Fig. 3 is a longitudinal section in a plane indicated by line a: in Fig 2. Fig. 4 is also a longitudinal section, but on line y-y of Fig. 2.

The same letters of reference are employed in all the gures in the designation oi' identical parts.

The meal from the cooling-room enters the bolt through the spout a, and is delivered into the head-end of the rst reel A, which is made of wire-cloth of uniform neness throughout, and is intended to separate the coarse bran from the meal. The meal sifts through the wire-cloth and falls into the trough A1, while the bran passes to the tail-end of the reel and is discharged through the chute al into a box, a2, (see Fig. 1,) from which it may all be directed into the discharge-spout a3; or portions of it may be passed through the slide a* into the elevator, for lpurposes soon to be described. The trough A1 contains a screwconveyer, which carries the meal sifted through the wire reel A into the spout b, from which it falls into the second reel B, located beneath the irst reel. The ner portions of the bran are here separated from the meal, which sii'ts through the bolting-cloth of the reel B, and is caught up by the trough B1 and delivered by the conveyer B2 through the chute b1 into the elevator C, the buckets of which carry it up and dump it into a box, c', to be passed from there into the head-end of the third or merchant reel D. The tailings from the reel B pass through the spout b2 into the last reel F of the series, and are finally dischargedfrom the tail-end of 'such reel into a suitable receptacle.

The merchant-reel D is covered with iine bolting-cloth, and makes iiour of the best quality up to near its tail-end, which is coveredy this reel to sift through. In damp weather the meal absorbs or takes up a good deal of moisture from the atmosphere, and in consequence becomes somewhat compact, and is apt to close up the meshes of the bolting-cloth of the merchant-reel, owing to which some flour will nd its way to the tail-end of the reel and escape, mingled with the oial, causing considerable loss. In order to overcome this diiculty, I propose, when the state of the atmosphere calls for it, to pass some of the coarse bran into this merchant-reel D for the purpose of clearing the meshes of the cloth of any tlour which may become lodged in them. The bran is obtained from the box a2 by opening the slide a4, and entirely or partly closing the slide over the discharge-spout a3, the bran thus caused to enter the elevator being carried up, together with the meal from the reel B, to the merchant-reel D. D1 is a fan attached to the shaft of the reel D, to induce a slight current, for the purpose of imparting greater agitation to the bran, and aiding in its motion toward the tail-end of the reel. The bran is discharged through the spout ct. The lour falls into the trough D2, the conveyer D? of which carries it to the spout d1 ready for packing. The offalsifting through the coarse portion of this reel is forced by reverse screwthreads upon the conveyer-shaft to the spout d, as shown in Fig. 4.-. All the flour sifting through this reel may not be of the standard quality, and contain minute specks of oft'al 5 therefore, to provide for a separation of such specky our, a series of slides, d2, is arranged in the bottom of the trough D2, either one of which, if necessary, may be opened to let the ilour sifting through the reel, in rear of such opened slide, fall into the trough D4 beneath, by the conveyer D5, by which it will be passed to the spout d1 to be delivered into the fourth reel E for further separation. The tailings from this reel E fall into the spout d, and so much of the flour as is up to the standard desired is directed by the conveyer E2 in the trough E1 into the spout e to be packed with the flour issuing from the spout dl; the rest of the flour deemed below the standard falling through either one of the slides e in the bottom of the trough E into another trough, E3, beneath, to be carried by the conveyer E4 therein to the spout d, from which it passes, mingled With the bran and other offal, into the last reel F. The remaining iour, or rather middlings, is here separated from as much offal as possible and carried by the left-handed screw-threads of the conveyer F2 in the trough Fl to the discharge-spout f, While the offal is forced by the right-handed screw-thread to the chute f', and the bran passes off as tailings.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In combination With the merchant-reel D, the fan D1, when arranged as and for the purpose set forth.

2. The combination and arrangement of the reel A, spout al, box a, bran-slide a, elevanesses.

DAVID SPEGK. Witnesses:

Jos. R. EDsON, J. W. Mrs'rER. 

